A different atom of iodine has a mass number of 128. What is this atoms relationship to the atom with a mass of 126

They are isotopes. Isotopes are molecules that have the same atomic number but have different atomic mass because the number of neutrons is different.

Iodine has an atomic mass of 126 g and its atomic number is 53.

# of neutrons = 126 - 53 = 73

Its isotope has an atomic mass of 128 g its atomic number is also 53, but the number of neutrons is different.

# neutrons = 128 -53 = 75

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samueladesida43 samueladesida43 · Answer 2 · 2021-10-15T12:42:54+02:00

The iodine atom that has a mass number of 128 is an ISOTOPE of the iodine atom that has a mass number of 126.

ISOTOPES:

Isotopes are atoms of the same element with different mass numbers but same atomic numbers.

Isotopes are different from one another being that they possess different number of neutrons in their atom, which is responsible for the difference in their mass numbers.

According to this question, an iodine atom has a mass number of 128 while another iodine atom has a mass number of 126. This means that they are isotopes of one another.
I - 128, I - 126

N.B: They both have an atomic number of 53

Therefore, the iodine atom that has a mass number of 128 is an ISOTOPE of the iodine atom that has a mass number of 126.

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